10 Pound Pork Loin Recipe: Herb-Crusted Roast with Juicy Pink Center

A 10-pound pork loin transforms any gathering into a showstopper—juicy, tender, and packed with flavor from edge to edge. After years of perfecting this technique at The Smoky Pig, I’ve cracked the code for achieving that legendary pink center while keeping the crust beautifully browned.

The secret lies in precise temperature control and a herb crust that seals in moisture without overpowering the natural richness of the meat.

This recipe delivers restaurant-quality results with minimal effort: just 45 minutes of active prep followed by hands-off roasting. The herb crust—made with rosemary, thyme, and garlic—adds aromatic depth while creating a crispy exterior that contrasts perfectly with the melt-in-your-mouth interior.

I’ve tested this method with pork loins weighing up to 12 pounds, and it never fails to impress.

By the time you carve into this roast, you’ll be rewarded with slices that stay together, release juices effortlessly, and deliver that satisfying sizzle when hitting the plate. The internal temperature of 140°F ensures a juicy pink center while the crust reaches a perfect 150°F for maximum flavor.

Serve with roasted root vegetables or a crisp apple salad to balance the richness.

For large gatherings, this recipe scales beautifully—simply adjust the roasting time by 15 minutes per additional pound. The herb crust can be prepped ahead, and the pork can rest while you finish sides. Here’s how to execute it flawlessly every time.

Ingredients for 10 lb pork loin

Ten pounds of pork transforms into a showstopper with these restaurant-quality ingredients.

The pork loin is the star—bone-in, center-cut is non-negotiable for even cooking and maximum flavor. I always source mine from Whole Foods or my local butcher, asking for a 2-inch thick cut with good marbling. Look for vibrant color and firm texture—no gray or slimy spots. Chill the loin uncovered overnight in the fridge to dry the surface for better crust adhesion. The herb crust relies on fresh rosemary and thyme from the grocery store’s refrigerated section (the good stuff, not the dried bundles). If you can’t find fresh, dried works at half the amount, but fresh delivers that aromatic depth that makes this dish special.

No fresh herbs? Dried rosemary and thyme at half the quantity will work, but toast them in a dry pan for 30 seconds to deepen their flavor. The apple cider vinegar in the brine might seem odd, but it tenderizes the meat without overpowering it—Bragg or local apple cider brands work best. If you’re short on time, skip the overnight brine and just season the pork 2 hours ahead. The butter and olive oil combo in the crust creates that perfect crispy exterior while keeping the interior juicy. For extra richness, add 1 tbsp of brown sugar to the crust mix. And if you’re feeling fancy, wrap the loin in pork butt bacon before roasting for an extra layer of flavor.

This roast reheats beautifully—just warm in a 350°F oven for 20 minutes covered with foil. The herb crust stays crispy if reheated quickly. Store leftovers in the fridge for up to 4 days, or freeze portions for 3 months. I always make a double batch because it disappears fast. The crust can be prepped ahead and stored in the fridge for 24 hours before roasting. For large gatherings, scale the recipe by adding 15 extra minutes of roasting time per additional pound—just increase the herbs and butter proportionally.

Step-by-step instructions for herb-crusted pork loin roast

Here’s how to transform that massive pork loin into tender, herb-infused perfection with a pink center.

In a large bowl, whisk together the 2 tablespoons apple cider vinegar, 1 tablespoon granulated sugar, and 1 cup hot water (just boiled and cooled). This creates a gentle marinade that tenderizes the meat while balancing flavors. The sugar helps caramelize slightly during roasting, adding depth to the crust.

Add the 10 cloves minced garlic cloves and let the mixture cool completely. Once at room temperature, pour it over the 10 lb bone-in pork loin in a gallon-sized zip-top bag. Seal tightly, submerge the pork completely, and refrigerate for 12-24 hours. This step is non-negotiable—it ensures that juicy pink center we’re after. Real talk: skipping this means tougher meat and less flavor penetration.

In a medium bowl, combine the 0.5 cup cold unsalted butter (cubed), 0.5 cup extra-virgin olive oil, 0.5 cup finely chopped fresh rosemary, 0.33 cup fresh thyme leaves, 0.5 cup freshly ground black pepper, and 0.75 cup coarse kosher salt. Use a fork to mash the butter and oil into the herbs until you get a thick, spreadable paste.

Remove the pork from the brine, patting it dry with paper towels—this is crucial for that crispy crust. Spread the herb butter mixture evenly over the entire surface, pressing it into the meat so it adheres well. Let the pork sit at room temperature for 1 hour before roasting. This resting period ensures even cooking and maximum flavor infusion. I know it seems like a long wait, but trust me—it’s worth it.

Preheat your oven to 325°F (convection if available) and place a rack in the lower third of the oven. This lower position allows the meat to baste in its own juices as it roasts. Place the pork loin on a rack set in a roasting pan to allow air circulation on all sides.

Roast for 3 hours, then baste with the 0.5 cup heavy cream (warmed slightly) and continue roasting for another 1-2 hours until the internal temperature reaches 140°F at the thickest part. The meat should still have a slight resistance when pierced with a meat thermometer—this ensures that juicy pink center. I press down gently on the fillet during the first minute to prevent curling, which guarantees even contact with the pan.

Remove the pork from the oven and transfer it to a cutting board. Tent loosely with aluminum foil and let it rest for 20-30 minutes. This resting period is where the magic happens—the juices redistribute throughout the meat instead of pooling on the cutting board. Don’t skip this step, even if it’s tempting to slice immediately.

While the pork rests, chop the 0.25 cup fresh parsley and sprinkle it evenly over the top. The parsley adds a bright finish that cuts through the richness of the herb crust. Slice against the grain into 1-inch thick portions and serve immediately with pan juices spooned over the top. Each slice should be tender enough to pull apart with a gentle tug, with that beautiful pink center you worked so hard to achieve.

Common mistakes when making perfect results

Overcooking the Loin

I can’t stress this enough—140°F internal temperature is your target, not 160°F. Pushing it to well-done transforms that juicy pink center into dry, stringy meat. Use a meat thermometer with a thick probe (like the ThermoWorks Smoke) to monitor the thickest part without piercing through the bone.

I’ve seen home cooks walk away for “just a few more minutes,” only to return with a rock-hard roast. Set a timer and walk away—this isn’t a dish you can babysit. 🌡️

Skipping the Brine

That overnight apple cider brine isn’t just flavor—it’s tenderization science. Without it, your pork will fight you every bite. I remember my first attempt without brining: the crust was perfect, but the meat was tough as boot leather.

The acid in the vinegar breaks down muscle fibers, while the sugar helps caramelize during roasting. If you’re short on time, at least season the pork 2 hours ahead—don’t skip this entirely.

Uneven Crust Application

The herb butter crust needs to be evenly distributed—no thick globs, no missed spots. I’ve seen roasts where one side got all the butter while the other was dry. Use your fingers to press the mixture firmly into every crevice.

For extra insurance, wrap the loin in pork butt bacon before roasting—this creates a second flavor barrier while ensuring even cooking. Pro tip: Chill the pork uncovered for 2 hours before applying the crust to help it adhere better.

Ignoring the Rest

That 20-30 minute rest isn’t optional—it’s where the juices redistribute. Skipping it means watching all that delicious moisture pool on your cutting board instead of staying in the meat. I’ve had guests cut into pork immediately and complain about dry slices.

Be patient! Cover the pork loosely with foil and let it rest while you finish sides or warm plates. The wait makes all the difference. ⏳

Wrong Oven Temperature

Low and slow is key—325°F gives you that perfect pink center without overcooking the exterior. I’ve seen people crank their ovens to 400°F+ thinking it’ll speed things up, but that just sears the outside while leaving the inside raw.

Use a convection oven if available—it circulates heat more evenly. And never, ever cover the pork with foil during roasting unless you want steamed meat. The crust needs to breathe!

Improper Slicing Technique

Always slice against the grain into 1-inch thick portions. Cutting with the grain turns each slice into chewy rubber bands. I use a Dexter-Russell 12-inch slicing knife for clean cuts. For extra presentation, fan the slices slightly on the plate.

And here’s a secret: If your pork is extra tender, pull it apart with your hands—it’s the ultimate test of success. 💪

Frequently asked questions about cooking a 10-Pound pork loin